CNC milling
For cost-efficient prototypes and production
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3-, 4- & 5-axis milling
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Lead times from 5 business days
CNC machining service Illinois
We manufacture high-quality, competitively priced custom prototypes & production parts. Upload a CAD file for an instant CNC machining quote. Order parts in 5 minutes from your desk.
Get an instant CNC quote All uploads are secure and confidentialOnline CNC machining in Illinois
Protolabs Network uses state-of-the-art technology to bring custom CNC machining online. We work with a large network of manufacturing partners that together have over 1,600 milling and turning machines, which means we always have capacity and very competitive prices. It also means we can produce both complex prototypes and low-volume production runs of precision machined parts, in a broad range of metals and plastics and with many surfaces finishes too. It’s like having an entire supply chain team for free.
CNC turning
CNC turning
Lathes and live tooling ideal for cylindrical parts
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60+ metals & plastics, including 10+ aluminum & 20+ steel
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Lead times from 5 business days
CNC Milling in Illinois
CNC machining is the most common subtractive manufacturing technology and a hugely flexible and robust method for producing custom metal and plastic parts. Converting 3D models into G-code, CNC machines remove material from a solid block with various cutting tools. The most popular type of CNC machining is CNC milling, which combines the same computer numerical control (CNC) with a multi-point cutting tool or milling cutter to produce parts with tight tolerances and impressive mechanical and material properties. CNC milling, available in 3-, 4- and 5-axis machines, involves mounting a workpiece to a machine bed and letting automated tools do the rest. It’s ideal for complex design, being one of the most accurate manufacturing techniques on the market. Engineers turn to CNC milling for a huge range of applications, including parts for the aerospace, automotive, consumer electronics and medical technology industries, as well as prototypes and models. While 3D printing offers more design freedom, CNC machining outclasses most additive technologies for low- to medium-volume production, especially with the material range including aluminum, bronze, copper, steel and other engineering metals and polymers.
CNC Turning in Illinois
CNC turning is another popular type of CNC machining, which uses state-of-the-art lathes and turning centers to produce complex, robust custom metal and plastic parts. Using CNC lathes and turning centers, our manufacturing partners can provide cost-efficient parts with simpler geometries. Live tooling is available for more complex geometries and is assessed on a case-by-case basis. Experienced operators use CNC turning machines for operations including parting, boring, facing, drilling, grooving and knurling, in contrast to how CNC milling machines are used. In general, CNC turning is a more affordable alternative to CNC milling and can outspeed milling in cases where the cutting tool’s range of motion is a mitigating factor. It’s important to note that CNC turning isn’t optimal for material conversation, but this is often a necessary trade-in for speed and price. Thanks to the high speed of turning tools, parts will have a lower roughness than milled components.
CNC surface finishing in Illinois
CNC machining is an ideal process for producing custom parts with tight tolerances and high levels of precision. The only potential downside is that CNC parts often require post-processing to erase tool marks and improve their surface finishes for cosmetic and functional purposes. Applying the right surface finishes can improve your part’s surface roughness, cosmetic and visual properties, wear and corrosion resistance and a lot more. Protolabs Network offers a wide range of surface finishing options, including smooth and fine machining, anodizing, polishing, bead blasting, brushing, black oxide, chromate conversion coating, electroless nickel plating and powder coating, as well as many other more specialized post-processing methods for niche industry applications. Every surface finish has its advantages and drawbacks, so choosing the right one depends on several factors. It’s important to evaluate how your part will be used and in what kind of environment to make the best determination. You can choose from a variety of surface finishes in Protolabs Network's quote builder and contact networksales@protolabs.com for more information.
Gallery of CNC machined parts
Here’s a small selection of the CNC machined prototypes and end-use parts we’ve produced for our customers.
CNC machining surface finishes
We can instantly quote a wide variety of post-machining surface finishes.
As machined
(Ra 3.2μm / Ra 126μin)
See details
Smooth machining
(Ra 1.6μm / Ra 63μin)
See details
Fine machining
(Ra 0.8μm / Ra 32μin)
See details
Polishing
(Ra 0.8μm / Ra 32μin)
See details
Brushed
(Ra 1.2μm / Ra 47μin)
See details
Bead blasted
See details
Powder coated
See details
Black oxide
See details
Electroless Nickel Plating
See details
Bead Blasted + Chromate Conversion Coating
See details
Bead Blasted + Anodized type III
(Hardcoat)
See details
Bead Blasted + Anodized type II
(Glossy)
See details
As machined + Anodized type II
See details
Brushed + Anodized type II
(Glossy)
See details
Bead blasted + Anodized type II
(Matte)
See details
As machined + Anodized type III
(Hardcoat)
See details
Instant, online CNC quotes
Instead of traditional, rules-based quoting, we use machine learning algorithms to compare your CAD to millions of previously manufactured parts and generate a quote instantly.
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Upload a CAD to start (STEP, STP, IGES, IGS, SLDPRT, 3DM, SAT, STL, OBJ or X_T)
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Price updates in real-time as you change materials, lead time, etc..
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No hidden costs. Our instant quotes are not just indications, but the actual price, and include shipping and customs up front.
CNC machining materials
We can generate instant machining quotes for 50+ metals and plastics.
Metals
Aluminum
Aluminum
Stainless steel
Stainless steel
Mild steel
Mild steel
Brass
Brass
Copper
Copper
Alloy steel
Alloy steel
Tool steel
Tool steel
Titanium
Titanium
Inconel
Inconel
Invar 36
Invar 36
Aluminum
Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance. Can be anodized.
Alloys
Aluminum 7075-T7351 | 3.4365 | 76528 | AlZn5.5MgCu Aluminum 6061-T651 | 3.3211 | 65028 | AlMg1SiCu Aluminum 7075-T651 | 3.4365 | 76528 | AlZn5.5MgCu Aluminum 6082-T651 | 3.2315 | 64430 | AlSi1MgMn Aluminum 6060 | 3.3206 | AlMgSi Aluminum 5052 | EN AW-5052 | 3.3523 | AlMg2,5 Aluminum 2017A | 3.1325 | 24530 | AlCu4MgSi Aluminum 2014 | 3.1255 | 24345 | AlCu4SiMg Aluminum 6063 | EN AW-6063 | 62400| AlMg0,7Si Aluminum 7050 | EN AW-7050 | 3.4144| AlZn6CuMgZr Aluminum 2024-T351 | 3.1355 | 24530 | AlCu4Mg1 Aluminum MIC6 Aluminum 7075-T6 | 3.4365 | 76528 | AlZn5,5MgCu Aluminum 5083-H111 | 3.3547 | 54300| AlMg4.5Mn0.7 Aluminum 6082 | 3.2315 | 64430| AlSi1MgMn Aluminum 6061-T6 | 3.3211| 65028| AlMg1SiCu Show all alloys
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Stainless steel
Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished.
Alloys
Stainless steel 416 | 1.4005 | X12CrS13 Stainless steel 15-5 | 1.4545 | X5CrNiCu15-5 Stainless steel 301 | 1.4310 | X10CrNi18-8 Stainless steel 430 | 1.4016 | X6Cr17 Stainless steel 440C | 1.4125 | X105CrMo17 Stainless steel 420 | 1.4028 | X30Cr13 Stainless steel 304/304L | 1.4301/1.4307 | X5CrNi18-10/X2CrNi18-9 Stainless steel 2205 Duplex | 1.4462 | 2205 | X2CrNiMoN 22-5-3 Stainless Steel 17-4 PH | 1.4542 | X5CrNiCuNb16-4 - Annealed state Stainless steel 303 | 1.4305 | X8CrNiS18-9 Stainless steel 316/316L | 1.4401/1.4404 | X5CrNiMo17-12-2/X2CrNiMo17-12-2 Show all alloys
Learn more
Mild steel
Mild steels are low-carbon metal alloys offering good mechanical properties, machinability and weldability at low cost. Can be carburized to increased hardness.
Alloys
Mild steel S275JR | 1.0044 | Fe430B | IS2062 Mild Steel S235JR | 1.0038 | Fe 360 B Carbon steel C45 | 1.0503 | 1045 | EN8 Mild steel S355J2 | 1.0577 | 1522H | Fe 510 D Mild steel 1045 | 1.0503 | C45 | EN8 Mild steel A36 | 1.025 | Fe 410 Mild steel 1018 | 1.1147 | C18 |16Mn Show all alloys
Learn more
Brass
Brass is a metal alloy with good machinability and excellent electrical conductivity. Ideal for applications that require low friction.
Alloys
Brass Cz121 | C38500 | 2.0401 | CuZn39Pb3 Brass C360 | 2.0375 | CuZn36Pb3 | 319 grade 2
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Copper
Copper offers excellent thermal and electrical conductivity, it's often used for busbars, wire connectors, and other electrical applications. Copper has a glossy reddish-orange appearance.
Alloys
Copper C101 | CU OFE Copper C110 | CU ETP
Learn more
Alloy steel
Alloy steels contain other alloying elements in addition to carbon, resulting in improved hardness, toughness, fatigue and wear resistance.
Alloys
Alloy steel 1.7131 | 16MnCr5 Alloy steel 1215 | EN1A | 1.0715 Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24 Alloy steel 4140 | 1.7225 | EN19 | 42CrMo4
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Tool steel
Tool steels are metal alloys with exceptionally high hardness, stiffness and abrasion resistance. Suitable for manufacturing industrial tools.
Alloys
Tool steel A3 - Annealed state Tool steel H13 | 1.2344 | X40CrMoV5-1 - Annealed state Tool steel S7 | 1.2355 | 50CrMoV13-15 - Annealed state Tool steel O1 | 1.2510 | 100MnCrW4 - Annealed state Tool steel A2 | 1.2363 | X100CrMoV5-1- Annealed state Tool steel D2 | 1.2379 | X153CrMoV12-1 - Annealed state Show all alloys
Learn more
Titanium
Titanium is a metal with excellent strength-to-weight ratio, low thermal expansion and high corrosion resistance that is sterilizable and biocompatible.
Alloys
Titanium Grade 5 | 3.7164 | Ti6Al4V Titanium Grade 2 | 3.7035 Titanium Grade 1 | 3.7025
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Inconel
Inconel is a high-strength, corrosion-resistant nickel alloy. Ideal for aerospace applications.
Alloys
Inconel 718
Learn more
Invar 36
Invar 36 is a nickel alloy with a very low coefficient of thermal expansion. Ideal for applications where high dimensional stability is required, such as precision instruments, engines valves and large aerostructure molds.
Alloys
Invar 36
Learn more
Plastics
POM (Delrin/Acetal)
POM (Delrin/Acetal)
Nylon
Nylon
PPSU
PPSU
ABS
ABS
PEEK
PEEK
PTFE (Teflon)
PTFE (Teflon)
Polycarbonate
Polycarbonate
Polyethylene
Polyethylene
PVC
PVC
PMMA (Acrylic)
PMMA (Acrylic)
PET
PET
Polypropylene
Polypropylene
G-10
G-10
FR4
FR4
PEI
PEI
POM (Delrin/Acetal)
POM is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability.
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Nylon
Nylon - polyamide (PA) - is an engineering thermoplastic with excellent mechanical properties and high chemical and abrasion resistance.
Learn more
PPSU
PPSU offers exceptional hydrolytic stability, and toughness superior to other commercially-available, high-temperature engineering resins. They offer high deflection temperatures and outstanding resistance to environmental stress cracking. This polymer is inherently flame retardant, and also has excellent thermal stability and good electrical properties.
Learn more
ABS
ABS is a common thermoplastic with all-around good mechanical properties, excellent impact strength, good heat resistance and good machinability.
Learn more
PEEK
PEEK is a high-performance engineering thermoplastic with excellent mechanical properties and chemical over a very wide temperature range.
Learn more
PTFE (Teflon)
PTFE is an engineering thermoplastic with excellent chemical and thermal resistance and the lowest coefficient of friction of any know solid.
Learn more
Polycarbonate
Polycarbonate (PC) is a thermoplastic with high toughness, excellent impact strength and good machinability. Can be optically transparent.
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Polyethylene
Polyethylene (PE) is a thermoplastic with high strength-to-weight ratio, good impact strength and excellent weather resistance.
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PVC
PVC is the third most used plastic with all-around good mechanical properties, excellent chemical and weather resistance and good toughness.
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PET
PET is a tough plastic that offers excellent wear resistance and mechanical strength.
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G-10
G-10 is a high-pressure fiberglass laminate with a high strength, low moisture absorption, and high level of electrical insulation and chemical resistance.
Learn more
FR4
FR4 is a class of glass fiber epoxy laminate that is flame retardant, with similar properties to G-10.
Learn more
PEI
Characterized by a combination of outstanding thermal, mechanical and electrical properties, Polyetherimide (PEI) has made its place in high performance applications like automotive, aerospace, industrial and many more.
Learn more
We can source any other material on request, but quotes take up to 48 hours.
Our ordering process
Upload CAD file
Securely upload your part design to our online quote builder
Confirm specs
Configure your part specifications and select a lead time that suits your schedule
Receive instant quote
Upload your CAD to our
online quoting platform
Manufacturing
We select the best manufacturer for your order, and production begins immediately
Quality control
We take full responsibility for making sure your parts are manufactured according to our standards
Delivery
Our CNC Machining service has been rated 4.9/5
Over 162 customers are satisfied with our CNC Machining service.
“Beautifully produced double sided spline shaft.”
—
Kyle Janny, Lake Mills
Aluminum 6061-T6, CNC machining
“Form, fit and function are as intended. Quick turn around time.”
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Joshua Lind, North Liberty
Aluminum 6061-T6, CNC machining
“Good parts as expected”
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Pratheen Barthiban, Waverly
Aluminum 6061-T6, CNC machining
“They turned out great. Good finish and good accuracy”
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christopher pedicini, franklin
Aluminum 6061-T6, CNC machining
“Parts were very well manufactured, kudos. However the main point I like to praise is the speed of process and execution!”
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Dragan Vukovic, Smyrna
ABS, CNC machining
“Very good part.”
—
Moxuan Li, Columbus
Aluminum 6061-T6, CNC machining
“The part was flawless.”
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Kris Steward, Cordova
Aluminum 6061-T6, CNC machining
“Fantastic machine finish. One of the best anodize finishes I've gotten from a prototype shop. Tolerances were held perfect.”
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David Morar, Canton
Aluminum 6061-T6, CNC machining
“Part looked fantastic”
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Cory Kunkel, Mentor
Aluminum 6061-T6, CNC machining
“Good job overall”
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Jason Van Severen, Mississauga
Aluminum 6061-T6, CNC machining
“Great”
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Adam Latour, Toronto
Ultem 1000, CNC machining
“My parts were perfect!”
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Andrew Stowell, Hagerstown
Aluminum 6061-T6, CNC machining
“Great price, good quality.”
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Andrew Priest, Apex
Aluminum 6061-T6, CNC machining
“Very nice work. The machined part had dowel holes of which were spot on in both size and position. Excellent work for not having the mating die-set part to work against.”
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Mark Rose, Conway
Aluminum 6061-T6, CNC machining
“Fit, finish and function are perfect.”
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Dennis Brady, Waxahachie
Aluminum 6061-T6, CNC machining
“Parts were perfect. Delivery was prompt. Great experience.”
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Leonard Haberman, Cypress
Alloy steel 4140, CNC machining
“Very nice. Finish was very good with minimal tool marks.”
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WILLIAM MEREDITH, Ottawa
Brass C360, CNC machining
“Good quality. Reasonable price”
—
Yuriy Mirochnik, Huntigdon Valley
Aluminum 6061-T6, CNC machining
“Perfectly accurate machining and hardly any tool marks; their standard "As Machined" finish looks exceptional.”
—
David Reinhardt, Monmouth Junction
Aluminum 6061-T6, CNC machining
“Great price”
—
Brandon Sweeney, Pflugerville
Aluminum 6061-T6, CNC machining
“Absolutely perfect!”
—
Bobby Watts, Winter Garden
Aluminum 6061-T6, CNC machining
“love your service and parts”
—
Jamie Ellenwood, Rapit City
Mild steel 1018, CNC machining
“we are very impressed and working on an order for 100 more pieces in Sept. thank you!!”
—
James Ellenwood, RAPID CITY
Aluminum 6061-T6, CNC machining
“great quality”
—
jamie Ellenwood, RAPID CITY
Mild steel 1018, CNC machining
“Done right in a timely fashion”
—
Jason Millard, rapid city
Alloy steel 4340, CNC machining
Consistent quality, every time with our CNC machining service
Protolabs Network guarantees the quality of every part we manufacture. Along with thoroughly vetting the manufacturing partners we work with, every order is dimensionally and visually inspected according to The Protolabs Network Standard. Globally manufactured orders also undergo a second inspection at our cross-docks in Amsterdam and Chicago when necessary.
The Protolabs Network Standard
The Protolabs Network Standard
We use a rigorous set of protocols and procedures to maintain quality
Learn more
From CNC rapid prototyping to production
Rapid prototyping
Our platform accelerates prototyping development cycles by reducing pre-production admin from weeks to minutes:
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Instant quotes
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Instant DFM feedback
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Online quote and order management
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Live delivery tracking
Our intuitive platform automates the ordering process, but if you ever need us, we're here to help.
Production
For production orders, we have full-service teams ready to guarantee identical specs on every order for the best unit price:
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Dedicated project managers in your time zone
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Application engineers for DFM cost optimizations
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First Article Inspection (FAI)
Manufacturing is about relationships, so we have staff on the ground wherever you are to help make sure everything runs smoothly and on time, every time.
Our distributed network of CNC machine shops
We offer you the capacity and capabilities of dozens of local and global machine shops, with the ease of dealing with one. You get the experience and specialization of all our partner shops, we handle all the communications, delivery, quality control and customs.
Parts in 1 day with Protolabs
Protolabs and its network work together to bring you the world's most comprehensive manufacturing solution. While the network can provide a large breadth of capabilities, Protolabs’ factories offer expedited manufacturing with automated in-house machines for the industry's fastest lead times.
Get quick-turn parts with Protolabs
How we compare to traditional CNC machine shops
As part of Protolabs’ global services, we are your comprehensive manufacturing solution from prototype to production. Here’s how we differ from traditional machine shops:
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We have an incredibly broad range of capabilities–much more than most individual shops.
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In most cases our quotes are instant. Request as many quotes as you like to find the best solution for your project.
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There is no minimum order quantity.
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We can scale with you from quick-turn prototypes with 1-day lead times to millions of production parts with volume pricing.
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We leverage a global network to guarantee competitive pricing on every order.
We machine custom parts for customers in multiple industries: aerospace, automotive, defense, electronics, hardware startups, industrial automation, machinery, manufacturing, medical devices, oil & gas and robotics.
Get started with our CNC machining service
How do you start CNC machining parts with Protolabs Network?
Protolabs Network combines its instant quoting tool and a global network of CNC machining centers to manufacture custom parts for applications ranging from rapid prototyping to serial production. You can use Protolabs Network's digital manufacturing platform to source high quality, complex metal and plastic parts efficiently and reliably.
To start sourcing CNC-machined parts with Protolabs Network, simply upload a CAD file and technical drawing to our free quote building tool. You’ll either receive an instant CNC quote and be able to start production in only a few clicks, or you’ll be directed to one of our engineers for potential design for manufacturability (DFM) guidance.
How does Protolabs Network's custom CNC machining service work?
CNC machining is the most common subtractive manufacturing technology available today and an optimal method for producing custom metal and plastic parts for prototyping and production applications. Using CAD (computer-aided design) modeling software and G-code, CNC milling and CNC turning machines remove material from a solid workpiece with precision and speed.
CNC machines manufacture robust parts with tight tolerances and a range of impressive material properties (mechanical and chemical). Our custom CNC machining service is ideal for one-off jobs and low-to-medium volume production, thanks to automation and high repeatability.
Hundreds of CNC machining shops in one network
Protolabs Network connects you with experienced manufacturing partners operating 2-, 3-, and 5-axis CNC machines. Our machinists work with a huge range of materials, including aluminum, stainless steel, mild, alloy & tool steels and production-grade polymers. We also offer many different surface finishing options such as anodizing, electroless nickel plating, powder coating and custom part marking with laser engraving and silk screening. For certain types of parts, you can also request rapid machining to get your parts manufactured in as few as five days.
Manufactured through Protolabs Network
FAQ's about CNC machining service
What tolerance standards do you guarantee?
We guarantee that our manufacturing partners follow ISO 2768 standards for all CNC machined parts. Parts machined with metal will follow ISO 2768-m (medium) or ISO 2768-f (fine). Parts machined with plastics will follow 2768-m (medium). Geometric tolerances down to ± 0004 in. (0.010 mm) are possible but must be clearly indicated in technical drawings. We can achieve tighter tolerances on shafts with up to H7 fits with manual quoting and on occasion tighter.
Read more about our standards for tolerances here
What are the minimum and maximum dimensions you can machine?
At Protolabs Network we offer CNC milling (3-axis, 3+2-axis and 5-axis) and turning. Milled parts can be machined up to 2000 x 1500 x 200 mm (78.7 x 59.0 x 7.8 in.) for 3/3+2 axis CNC milling. For 5-axis milling, the maximum part size is 650 x 650 x 300 mm (25.5 x 25.5 x 11.8 in.). The maximum diameter for CNC turning is 431mm (17 in.), length 990 mm (39 in). Minimum part dimensions recommended are around 0.39 x 0.39 x 0.39 in. (10 x 10 x 10mm).The minimum for feature dimensions is 0.5 mm.
We are limited to a 1000 mm (39 in.) maximum size for parts on our platform. If you need higher dimensions, you can place the request through your account manager.
What cosmetic standards do you guarantee?
Deburring and edge breaking are standard procedures for all CNC machined parts. If there are any critical edges that should be left sharp, they must be clearly indicated in technical drawings. Surfaces will be free of defects such as scratches, dents, stains, blemishes, hanging marks, minor defects. Surfaces indicated as critical (primary (a) side, as indicated on the technical drawing) will be free of mill steps and other marks. For the secondary (b) side, minor hanging marks and up to 2 minor defects are acceptable. A number of post-processing and finishing methods can be applied to improve the surface roughness, visual properties and wear resistance of machined parts.
How much does your CNC machining service cost?
We use machine learning algorithms to calculate the exact cost of any machinable part directly from a CAD file, based on millions of CNC machining orders we’ve previously processed. No more waiting for technicians to get back to you via email, we can generate an exact quote for you instantly (well, in about 5 seconds).
This means you always know the price up front. Simply upload a CAD file to generate a quote: get an instant CNC machining quote. Our quotes are completely free, you only need to create an account so we can protect your IP.
It’s so easy to use that we encourage mechanical engineers to use it constantly as they optimize their designs for cost. Whenever you’ve made a new design iteration, simply load both the old and the new design into our quoting tool and see if the price is different.
This technology means our manufacturing partners also don’t need to do their own machining quotes, which means less overhead for them. This makes the whole process less expensive, which translates into lower prices for our customers.
How can I reduce the cost of my machined parts?
The main costs associated with CNC machining can be grouped into machining time, start-up costs, material costs, and feature costs. To reduce costs you need to understand the impact of these factors on cost.
The best way to reduce machining time is to design features that can be machined quickly, for example by choosing the correct radii for internal corners, reducing cavity depth, increasing wall thicknesses, limiting thread length and designing holes with standard sizes.
Material costs can be reduced by considering the size of the blank required, and the cost and machinability of the bulk material (softer alloys are faster to machine).
Start-up costs can be reduced by reducing the number part rotations or repositioning required to finish the part, for example by separating geometries into multiple parts that can be assembled later.
Feature costs can be reduced by only using tolerances when strictly necessary, removing all text & lettering, and avoiding multiple surface finishes.
These tips can be read in more detail in our full guide to reducing the cost of CNC machined parts.
How do you select the exact manufacturer for my parts?
We use algorithms to identify the best manufacturer in our network for your specific order, based on their proximity to you, their experience with similar parts and their available capacity right now. This allows us to balance our customers’ demands for speed, cost and quality better than ever before.
Where can I learn more about CNC machining?
Protolabs Network was started by mechanical engineers and we have many more engineers and technicians in our team. Together we’ve written a lot of content on CNC machining over the years. You can find a selection of resources below, or you can head to our knowledge hub and filter on CNC machining to read case studies, in-depth design guidelines and explanations of different surface finishes.
We’ve also written a complete engineering guide to CNC machining. Here you can learn about how the many different kinds of mills and lathes work and the different materials available, so you can easily compare their benefits & limitations. You’ll also learn the basic design rules for machining and the most common applications of each material and surface finish, so you can make the right choices every time.
Should I choose local or global manufacturing?
Customers in the US and EU can choose local or global manufacturing for CNC machined parts. Local orders are manufactured within your customs-clearance zones, allowing for shorter lead times (from 5 days) and faster delivery as there’s no need for shipments to clear customs. Global orders generally result in longer lead times at a lower price. The best option depends on the timeline and requirements of your project.
How does Protolabs Network's custom CNC machining service work?
Using CAD (computer-aided design) modeling software and G-code, CNC milling and CNC turning machines remove material from a solid workpiece with precision and speed. CNC machines manufacture parts with tight tolerances and a range of impressive mechanical and chemical properties. Our custom CNC machining service is ideal for one-off jobs and low-to-medium volume production, thanks to automation and high repeatability.
How do you start CNC machining parts with Protolabs Network?
Our global network of CNC machining centers manufacture custom parts for applications ranging from rapid prototyping to serial production. To start sourcing CNC-machined parts, simply upload a CAD file and technical drawing to our online Quote Builder. You’ll either receive an instant CNC quote and be able to start production in only a few clicks, or you’ll be directed to one of our engineers for design for manufacturability (DFM) guidance.
CNC machining resources for engineers
What is CNC machining?
Read article
How to design parts for CNC machining
Read article
14 proven design tips to reduce the cost of CNC machining
Read article
How to prepare a technical drawing for CNC machining
Read article
How do you select the right materials for CNC machining?
Read article
What are the types of surface finishes for CNC machining?
Read article
What is heat treatment and how does it improve CNC-machined parts?
Read article
3D printing vs. CNC machining: Which is better for prototyping and end-use parts?
Read article
CNC machining: The manufacturing & design guide
Learn about how the many different kinds of CNC machines work, the materials available, the benefits & limitations, basic design rules and the most common applications.
Read article
What is CNC machining?
What is CNC machining and how does it work? Learn the basic principles and fundamental mechanics, as well as the key benefits and limitations, of this subtractive manufacturing process.
Read article
How to design parts for CNC machining
In this complete guide to designing for CNC machining, we've compiled basic & advanced design practices and tips to help you achieve the best results for your custom parts.
Read article
14 proven design tips to reduce the cost of CNC machining
Make the most of CNC machining by optimizing your design and making the right material choices. Read these 14 design tips to help you reduce CNC-machining costs and create the perfect parts for your project.
Read article
How to prepare a technical drawing for CNC machining
How do you prepare technical drawings for CNC machining and why are they important? Technical drawings are widely used in manufacturing to improve the communication of technical requirements between the designer and engineer and the manufacturer.
Read article
How do you select the right materials for CNC machining?
This comprehensive guide compares the 25 most common materials used in CNC machining and helps you choose the right one for your application.
Read article
What are the types of surface finishes for CNC machining?
What surface finishes are available for CNC machining? You can apply post-processing and surface finishes to improve the surface roughness, cosmetic properties and wear resistance of metal parts. Learn about the most common ways to finish CNC machined parts, and how to select the best methods for your applications.
Read article
What is heat treatment and how does it improve CNC-machined parts?
What are the different types of heat treatment and how do they affect CNC-machined parts? This article explores how heat treatments can be applied to many metal alloys to drastically improve key physical properties like hardness, strength and machinability.
Read article
3D printing vs. CNC machining: Which is better for prototyping and end-use parts?
Is 3D printing or CNC machining better for your custom part applications? Learn the practical differences between CNC machining and 3D printing and how to select the right technology for manufacturing prototypes, end-use parts and everything in between.
Read articleOur other manufacturing capabilities
3D printing
3D printing
FDM, SLA, SLS, MJF
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25+ plastics & 35+ colors
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±0.5% dimensional accuracy with a lower limit down to ±0.0059 in (0.15 mm)
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Lead times from 1 business day
Sheet metal fabrication
Sheet metal fabrication
Laser cutting, bending, post-processing
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Tolerances down to ±0.1 mm (±.004 in)
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Lead times from 5 business days
Injection molding
Injection molding
Prototypes and production tooling
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Wide range of part complexities and sizes
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1 to 1M parts
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